@article{fdi:010066274,
  title = {{A} test of the cosmogenic {B}e-10(meteoric)/{B}e-9 proxy for simultaneously determining basin- wide erosion rates, denudation rates, and the degree of weathering in the {A}mazon basin},
  author = {{W}ittmann, {H}. and von {B}lanckenburg, {F}. and {D}annhaus, {N}. and {B}ouchez, {J}. and {G}aillardet, {J}. and {G}uyot, {J}ean-{L}oup and {M}aurice, {L}aurence and {R}oig, {H}. and {F}ilizola, {N}. and {C}hristl, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e present an extensive investigation of a new erosion and weathering proxy derived from the {B}e-10(meteoric)/{B}e-9(stable) ratio in the {A}mazon {R}iver basin. {T}his new proxy combines a radioactive atmospheric flux tracer, meteoric cosmogenic {B}e-10, with {B}e-9, a trace metal released by weathering. {R}esults show that meteoric {B}e-10 concentrations ([{B}e-10]) and {B}e-10/{B}e-9 ratios increase by >30% from the {A}ndes to the lowlands. {W}e can calculate floodplain transfer times of 2-30 kyr from this increase. {I}ntriguingly however, the riverine exported flux of meteoric {B}e-10 shows a deficit with respect to the atmospheric depositional {B}e-10 flux. {M}ost likely, the actual area from which the {B}e-10 flux is being delivered into the mainstream is smaller than the basin-wide one. {D}espite this imbalance, denudation rates calculated from {B}e-10/{B}e-9 ratios from bed load, suspended sediment, and water samples from {A}mazon {R}ivers agree within a factor of 2 with published in situ {B}e-10 denudation rates. {E}rosion rates calculated from meteoric [{B}e-10], measured from depth-integrated suspended sediment samples, agree with denudation rates, suggesting that grain size-induced variations in [{B}e-10] are minimized when using such sampling material instead of bed load. {I}n addition, the agreement between erosion and denudation rates implies minor chemical weathering intensity in most {A}mazon tributaries. {I}ndeed, the {B}e-specific weathering intensity, calculated from mobilized {B}e-9 comprising reactive and dissolved fractions that are released during weathering, is constant at approximately 40% of the total denudation from the {A}ndes across the lowlands to the {A}mazon mouth. {T}herefore, weathering in the {A}mazon floodplain is not detected.},
  keywords = {{AMAZONE} {COURS} {D}'{EAU} ; {AMAZONE} {BASSIN} ; {BOLIVIE} ; {PEROU} ; {BRESIL} ; {GUYANES} {PLATEAU} ; {BRESIL} {PLATEAU} ; {ANDES}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {E}arth {S}urface},
  volume = {120},
  numero = {12},
  pages = {2498--2528},
  ISSN = {2169-9003},
  year = {2015},
  DOI = {10.1002/2015jf003581},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066274},
}